Milling machine X-axis braking protection device

Abstract

The invention discloses a milling machine X-axis braking protection device which comprises a major loop and a control loop, wherein the major loop comprises a first alternating-current contactor, a second alternating-current contactor, a thermal relay, a direct-current contactor, a direct-current braking power supply and a milling machine X-axis motor, and the control loop comprises a forward switch, a reverse switch, a first time relay, a second time relay, an auxiliary contact of the first alternating-current contactor and an auxiliary contact of the second alternating-current contactor. Thefirst time relay controls braking stopping of the milling machine X-axis motor, the second time relay is introduced based on the condition and can also force delay for a preset time when directions are changed even if operating directions are frequently changed by operators, reversing operations of the operators can only take effect after the preset time, so that electric appliance failure causedby frequent switching of the operating directions by the operators is avoided, maintenance cost is reduced, and the service life of the device is prolonged.

Description

technical field [0001] The invention relates to the technical field of milling machines, in particular to an X-axis braking protection device of a milling machine. Background technique [0002] A milling machine refers to a machine tool that uses a milling cutter to process various surfaces of a workpiece, including movements in three directions: X-axis, Y-axis and Z-axis. At present, the X-axis movement of most milling machines is realized by the ball screw, which has low friction and fast movement. Therefore, the dynamic braking process is generally introduced when the braking stops. This braking method has the advantages of simple circuit and low cost. Low cost, simple debugging and so on. [0003] At present, the operator uses the joystick to move the X-axis forward and reverse. When switching the forward and reverse directions, the joystick must be stopped at the middle stop position, and then the operation moves in the opposite direction after the braking stops. Howe...

AI Technical Summary

Problems solved by technology

However, the operator often cannot change the operating direction frequently in accordance with the operating procedures during operation, which will cause the following problems: one, the brake contactor contact is easy to burn the contact due to frequent braking and ignition in a short period of time; The frequent addition of DC braking to the motor in a short period of time is likely to cause heat generation and seriously burn the motor; 3. Frequent braking of the forward and reverse rotation of the motor is prone to arc short circuit, and in severe cases, the power distribution trip in the workshop; 4. The life of the motor is reduced

Images